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tzfile.h is an internal header that should never have been installed.
What's worse, the tzfile.h that gets installed is over 20 years old
and doesn't match the real tzfile.h in libc/time.  This makes the
tree safe for /usr/include/tzfile.h removal.  The TM_YEAR_BASE
define has been moved to time.h temporarily until its usage is
replaced by 1900 in the tree.  Actual removal of tzfile.h is pending
a ports build.  Based on a diff from deraadt@

/*	$OpenBSD: lprint.c,v 1.12 2015/03/15 00:41:28 millert Exp $	*/

/*
 * Copyright (c) 1989 The Regents of the University of California.
 * All rights reserved.
 *
 * This code is derived from software contributed to Berkeley by
 * Tony Nardo of the Johns Hopkins University/Applied Physics Lab.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */

#include <sys/types.h>
#include <sys/file.h>
#include <sys/stat.h>
#include <sys/time.h>
#include <stdio.h>
#include <string.h>
#include <time.h>
#include <ctype.h>
#include <paths.h>
#include <vis.h>
#include "finger.h"
#include "extern.h"

#define	LINE_LEN	80
#define	TAB_LEN		8		/* 8 spaces between tabs */
#define	_PATH_PLAN	".plan"
#define	_PATH_PROJECT	".project"

void
lflag_print(void)
{
	PERSON *pn;

	for (pn = phead;;) {
		lprint(pn);
		if (!pplan) {
			(void)show_text(pn->dir, _PATH_PROJECT, "Project:");
			if (!show_text(pn->dir, _PATH_PLAN, "Plan:"))
				(void)printf("No Plan.\n");
		}
		if (!(pn = pn->next))
			break;
		putchar('\n');
	}
}

void
lprint(PERSON *pn)
{
	struct tm *delta;
	WHERE *w;
	int cpr, len, maxlen;
	struct tm *tp;
	int oddfield;
	char *t, *tzn;

	cpr = 0;
	/*
	 * long format --
	 *	login name
	 *	real name
	 *	home directory
	 *	shell
	 *	office, office phone, home phone if available
	 *	mail status
	 */
	(void)printf("Login: %-15s\t\t\tName: %s\nDirectory: %-25s",
	    pn->name, pn->realname, pn->dir);
	(void)printf("\tShell: %-s\n", *pn->shell ? pn->shell : _PATH_BSHELL);

	/*
	 * try and print office, office phone, and home phone on one line;
	 * if that fails, do line filling so it looks nice.
	 */
#define	OFFICE_TAG		"Office"
#define	OFFICE_PHONE_TAG	"Office Phone"
	oddfield = 0;
	if (pn->office && pn->officephone &&
	    strlen(pn->office) + strlen(pn->officephone) +
	    sizeof(OFFICE_TAG) + 2 <= 5 * TAB_LEN) {
		(void)snprintf(tbuf, sizeof(tbuf), "%s: %s, %s",
		    OFFICE_TAG, pn->office, prphone(pn->officephone));
		oddfield = demi_print(tbuf, oddfield);
	} else {
		if (pn->office) {
			(void)snprintf(tbuf, sizeof(tbuf), "%s: %s",
			    OFFICE_TAG, pn->office);
			oddfield = demi_print(tbuf, oddfield);
		}
		if (pn->officephone) {
			(void)snprintf(tbuf, sizeof(tbuf), "%s: %s",
			    OFFICE_PHONE_TAG, prphone(pn->officephone));
			oddfield = demi_print(tbuf, oddfield);
		}
	}
	if (pn->homephone) {
		(void)snprintf(tbuf, sizeof(tbuf), "%s: %s",
		    "Home Phone", prphone(pn->homephone));
		oddfield = demi_print(tbuf, oddfield);
	}
	if (oddfield)
		putchar('\n');

	/*
	 * long format con't:
	 * if logged in
	 *	terminal
	 *	idle time
	 *	if messages allowed
	 *	where logged in from
	 * if not logged in
	 *	when last logged in
	 */
	/* find out longest device name for this user for formatting */
	for (w = pn->whead, maxlen = -1; w != NULL; w = w->next)
		if ((len = strlen(w->tty)) > maxlen)
			maxlen = len;
	/* find rest of entries for user */
	for (w = pn->whead; w != NULL; w = w->next) {
		switch (w->info) {
		case LOGGEDIN:
			tp = localtime(&w->loginat);
			t = asctime(tp);
			tzn = tp->tm_zone;
			cpr = printf("On since %.16s (%s) on %s",
			    t, tzn, w->tty);
			/*
			 * idle time is tough; if have one, print a comma,
			 * then spaces to pad out the device name, then the
			 * idle time.  Follow with a comma if a remote login.
			 */
			delta = gmtime(&w->idletime);
			if (delta->tm_yday || delta->tm_hour || delta->tm_min) {
				cpr += printf("%-*s idle ",
				    (int)(maxlen - strlen(w->tty) + 1), ",");
				if (delta->tm_yday > 0) {
					cpr += printf("%d day%s ",
					   delta->tm_yday,
					   delta->tm_yday == 1 ? "" : "s");
				}
				cpr += printf("%d:%02d",
				    delta->tm_hour, delta->tm_min);
				if (*w->host) {
					putchar(',');
					++cpr;
				}
			}
			if (!w->writable)
				cpr += printf(" (messages off)");
			break;
		case LASTLOG:
			if (w->loginat == 0) {
				(void)printf("Never logged in.");
				break;
			}
			tp = localtime(&w->loginat);
			t = asctime(tp);
			tzn = tp->tm_zone;
			if (now - w->loginat > SIXMONTHS)
				cpr =
				    printf("Last login %.16s %.4s (%s) on %s",
				    t, t + 20, tzn, w->tty);
			else
				cpr = printf("Last login %.16s (%s) on %s",
				    t, tzn, w->tty);
			break;
		}
		if (*w->host) {
			if (LINE_LEN < (cpr + 6 + strlen(w->host)))
				(void)printf("\n   ");
			(void)printf(" from %s", w->host);
		}
		putchar('\n');
	}
	if (pn->mailrecv == -1)
		printf("No Mail.\n");
	else if (pn->mailrecv > pn->mailread) {
		tp = localtime(&pn->mailrecv);
		t = asctime(tp);
		tzn = tp->tm_zone;
		printf("New mail received %.16s %.4s (%s)\n", t, t + 20, tzn);
		tp = localtime(&pn->mailread);
		t = asctime(tp);
		tzn = tp->tm_zone;
		printf("     Unread since %.16s %.4s (%s)\n", t, t + 20, tzn);
	} else {
		tp = localtime(&pn->mailread);
		t = asctime(tp);
		tzn = tp->tm_zone;
		printf("Mail last read %.16s %.4s (%s)\n", t, t + 20, tzn);
	}
}

int
demi_print(char *str, int oddfield)
{
	static int lenlast;
	int lenthis, maxlen;

	lenthis = strlen(str);
	if (oddfield) {
		/*
		 * We left off on an odd number of fields.  If we haven't
		 * crossed the midpoint of the screen, and we have room for
		 * the next field, print it on the same line; otherwise,
		 * print it on a new line.
		 *
		 * Note: we insist on having the right hand fields start
		 * no less than 5 tabs out.
		 */
		maxlen = 5 * TAB_LEN;
		if (maxlen < lenlast)
			maxlen = lenlast;
		if (((((maxlen / TAB_LEN) + 1) * TAB_LEN) +
		    lenthis) <= LINE_LEN) {
			while(lenlast < (4 * TAB_LEN)) {
				putchar('\t');
				lenlast += TAB_LEN;
			}
			(void)printf("\t%s\n", str);	/* force one tab */
		} else {
			(void)printf("\n%s", str);	/* go to next line */
			oddfield = !oddfield;	/* this'll be undone below */
		}
	} else
		(void)printf("%s", str);
	oddfield = !oddfield;			/* toggle odd/even marker */
	lenlast = lenthis;
	return (oddfield);
}

int
show_text(char *directory, char *file_name, char *header)
{
	int ch, lastc;
	FILE *fp;

	lastc = 0;
	(void)snprintf(tbuf, sizeof(tbuf), "%s/%s", directory, file_name);
	if ((fp = fopen(tbuf, "r")) == NULL)
		return (0);
	(void)printf("%s\n", header);
	while ((ch = getc(fp)) != EOF)
		vputc(lastc = ch);
	if (lastc != '\n')
		(void)putchar('\n');
	(void)fclose(fp);
	return (1);
}

void
vputc(int ch)
{
	char visout[5], *s2;

	ch = toascii(ch);
	vis(visout, ch, VIS_SAFE|VIS_NOSLASH, 0);
	for (s2 = visout; *s2; s2++)
		(void)putchar(*s2);
}